Re: iPad download
by John C Frain

On an Android phone or tablet and on an Amazon Fire tablet one can install Userland which offers a choice of Linux systems. Gretl 2016d is available as a package in this system. The gretl graphic interface does not fit well on a mobile phone but it is just about usable on a 10 inch Fire tablet. I presume that one might be able to use the command line. I have used the octave command line in Userland for some calculations.
On 25 September 2019, at 09:15, Hélio Guilherme <helioxentric(a)gmail.com> wrote:
That is not possible.
Gretl is a computer only software. There are a lot of dependencies libraries that are not available in mobile (tablet, smartphones) devices.
On Wed, Sep 25, 2019 at 9:11 AM <davidebarbato_98(a)live.it> wrote:
Hi everybody,
How can I download Gretl for iPad?
Thanks in advance
Davide
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1 year, 1 month

Gretl crashed again while opening data series with data string that gretl didn't like.
by Fred Engst

Sorry, Allin, more work for you.
When I opened excel file downloaded from FRED called usrec.xls
window opened asking import from c1 r1, so I clicked OK,
it crashed.
This is repeatable.
I found out that the reason for crash has to do with the headers from the FRED file that had a lot of information before the real data starts on row 11.
After deleting the first 10 rows, if I save the file
1. in csv format, it will be OK. The dates are ok too.
2. in xlsx format, it will not crash, but the dates were not read-in. I had to set the dates myself.
3. In xls format, I get this message:
Expected numeric data, found string:
"1854-12-01" at row 2, column 1
Perhaps you need to adjust the starting column or row?
So, it shouldn’t crash just because I imported the wrong kind of data.
Furthermore, there is some kind of inconsistency between the different file format when gretl deciding on the date value.
Thanks in advance for all your work.
Fred
Attached is the crash report.
1 year, 2 months

About the invcdf function for discrete distributions
by Alecos Papadopoulos

Are we sure that the invcdf function works correctly for the case of
discrete distributions?
The inverse CDF method of generating a random variable using a
Uniform[0,1] is valid also for discrete rv's (by using the generalized
inverse), so I tried
<hansl>
series U = randgen(U,0,1) # generate Uniform(0,1)
series Xd = invcdf(P, 2, U) # generate Poisson with mean 2
</hansl>
but the Xd series did not have integer values, so it cannot be a Poisson rv.
--
Alecos Papadopoulos PhD
Athens University of Economics and Business
web: alecospapadopoulos.wordpress.com/
1 year, 2 months

Create panel dataset
by ΑΝΔΡΕΑΣ ΖΕΡΒΑΣ

Hi all,
Just a quick question: suppose that one has several files with time
series, e.g. several files with macro data, each file for a country (or
maybe one file with time series from several countries). Is there a way
to create from hansl a panel dataset, without copying (stacking) the
data into a spreadsheet?
Many thanks in advance,
Andreas
1 year, 2 months

Re: Gretl-users Digest, Vol 152, Issue 31 - the invcdf function
by Alecos Papadopoulos

I found the following in
https://github.com/poliastro/cephes/blob/master/src/pdtr.c
*
*
* SYNOPSIS:
*
* int k;
* double m, y, pdtr();
*
* y = pdtr( k, m );
*
*
*
* DESCRIPTION:
*
* Returns the sum of the first k terms of the Poisson
* distribution:
*
* k j
* -- -m m
* > e --
* -- j!
* j=0
*
* The terms are not summed directly; instead the incomplete
* Gamma integral is employed, according to the relation
*
* y = pdtr( k, m ) = igamc( k+1, m ).
*
* The arguments must both be positive.
Alecos Papadopoulos PhD
Athens University of Economics and Business
web: alecospapadopoulos.wordpress.com/
On 28/9/2019 01:00, gretl-users-request(a)gretlml.univpm.it wrote:
> Hmm, it seems there's something odd about the cephes function we're=20
> using to give the answer here, namely pdtri(). For the most part the=20
> cephes suite, written by Stephen Moshier, is fast and accurate, but=20
> I agree that something looks to be amiss here. I'll try to find out=20
> what.
>
> (In case anyone is able to help: cephes' pdtri() takes two=20
> arguments, an integer k and a double 0 < y < 1 (probability). And=20
> the doc says "Finds the Poisson variable x such that the integral=20
> from 0 to x of the Poisson density is equal to the given probability=20
> y." So what's "k"? If it's the mean (=3D variance) it shouldn't have=20
> to be an integer, should it?)
1 year, 2 months

Create panel dataset
by anzervas＠yahoo.com

Hi all,
Just a quick question: suppose that one has several files with time series, e.g. several files with macro data, each file for a country (or maybe one file with time series from several countries). Is there a way to create from hansl a panel dataset, without copying (stacking) the data into a spreadsheet?
Many thanks in advance,
Andreas
1 year, 2 months

garch rolling windows forecasting
by Burak Korkusuz

Hi,I am trying to rolling windows forecasting with GARCH model. I have codes for that but it is not working. Does anyone know what is the issue? I have obs. 1-2409.
smpl 23 500GARCH_11<=garch 1 1 ; return const -q
scalar T = $tmax
scalar t = $t2loop while t<=T -q
print GARCH_11 -o if t<T
smpl +1 +1endif
t++
endloop
1 year, 2 months

iPad download
by davidebarbato_98＠live.it

Hi everybody,
How can I download Gretl for iPad?
Thanks in advance
Davide
1 year, 2 months

Resample without replacement
by Ioannis A. Venetis

Hi all,
From what I see, Matlab uses
======
p = randperm(n)
p = randperm(n,k)
Description
p = randperm(n) returns a row vector containing a random permutation of
the integers from 1 to n inclusive.
p = randperm(n,k) returns a row vector containing k unique integers
selected randomly from 1 to n inclusive.
======
to create an index of integers that can be used then to select/permute
the columns (or rows) of a matrix
Yiannis
1 year, 2 months